US 7149525

I'll search for the specific patent number and check for any 2026 CAFC activity.

Let me run a couple of more targeted checks for any litigation, PTAB, or 2026 appellate activity specifically on this patent.

US 7,149,525 B2 — Summary

Note on search scope: I ran targeted queries for the exact strings "7149525" / "7,149,525" in combination with litigation, IPR, and Federal Circuit terms. I found no district-court suit, PTAB proceeding, or 2026 CAFC docket activity naming this patent. I do not have direct PACER/CM‑ECF or USPTO Patent Public Search access from here, so that negative result reflects public web sources only — it should be confirmed in CM‑ECF and PatentCenter before being relied on. Also be aware that the bare string "7149525" is not unique; one search hit was an unrelated FDA FAERS adverse-event case number. Treat only patent-database hits as relevant.

Bibliographic data (from the authoritative patent text)

The '525 patent is a continuation of the earlier White application that issued as US 7,072,659 ("System for selectively answering a telephone from a remote location"). The '525 claims are essentially the same disclosure with the claims re-drafted in system form — a common continuation strategy to obtain a second, differently-scoped claim set off the same 2004 priority date.

Abstract (verbatim)

A system to selectively answer a telephone is disclosed and includes a stationary unit connectable in line with a telephone line extending to the telephone. The stationary unit includes: a first antenna coupled to a first transmitter-receiver to communicate with a portable unit that includes a second antenna coupled to a second transmitter-receiver; a switching circuit to seize the telephone line after receiving a signal received from a first activatable switch of the portable unit, from a second activatable switch of the portable unit, or any combination thereof; and an autodialer circuit to dial a pre-programmed telephone number in response to a signal received from the second activatable switch of the portable unit. The stationary unit receives verbal communications from the portable unit and transmits the verbal communications via the telephone line after the telephone line is seized. At least one of the stationary unit and the portable unit includes a counter-timer circuit to restrictively permit activation of the autodialer circuit when the second activatable switch is activated a number of times within a time period.

Plain-language overview of the independent claims

Claim 1 — the stationary-side system. A base unit that plugs in line with the home phone line (e.g., between the wall jack and the telephone). It has a radio antenna/transceiver to talk to a small wearable remote, a switching circuit that takes the phone line off-hook ("seizes" it) when the remote's answer button, or its emergency button, or both, is pressed, and an autodialer that calls a stored number when the emergency button is pressed. After seizure, the base relays the user's voice from the remote out over the phone line. Crucially, a counter-timer circuit makes the autodialer fire only when the emergency button is pressed a defined number of times within a defined time window, so an accidental bump does not place a 911-type call. The dependent claims add: a ring detector that wakes the system on an incoming ring (claim 2, with claimed detection of ~70–90 VAC at ~17–20 Hz in claim 4); an enclosure housing (3); AC power cord/pronged plug (5); relay-based switching (6); transceiver implementations (7); caller-ID signal processing (8); off-hook seizure responsive to either switch (9); a speech network for duplex operation (10); emergency response as the pre-programmed number (11); a user programming panel (12) with the number stored in stationary-unit memory (13); and a backup replaceable battery (14) with a test-button/LED battery test circuit (15).

Claim 16 — the portable/remote-side system. The wearable unit itself: an antenna/transceiver to link to the base, a first activatable switch that triggers the base to seize the line in response to an incoming ring (the "answer" button), a second activatable switch that triggers both seizure and dialing of a pre-programmed number (the "emergency/911" button), and a microphone that sends the user's voice to the base for transmission over the seized line. The same counter-timer limitation appears in the final wherein clause. Dependents add on-person wearing means — armlet, band, belt, bracelet, clasp, clip, chain, hook, loop, necklace, pin, ring, string, strap, or combinations (17); a speaker for hearing the other party (18); push-button-type switches (19); and a viewable display for caller-ID information received at the base (20).

The specification's commercial framing is a lightweight, single-purpose pendant/necklace or belt-clip device for elderly, infirm, disabled, or non-ambulatory users — the design is explicitly justified in the Background as an alternative to carrying a bulky cordless handset or a feature-complex cellphone that may have poor indoor reception.

Drafting/quality observations (analyst notes, not legal conclusions)

• Antecedent basis problem in claim 16. Claim 16 is drafted as a portable unit claim and never positively recites an "autodialer circuit," yet its closing wherein clause refers to "activation of the autodialer circuit." The autodialer is only introduced in claim 1. This is a potential 35 U.S.C. § 112(b) indefiniteness exposure if the claim were ever construed, and it reflects the claim having been lifted essentially verbatim from the parent-family disclosure.
• Claim 16 contains the apparent typo "a stationary, unit."
• Cited references of record (9): US 3,811,012 (Barber); US 4,760,593 (Lifeline Systems); US 5,559,860 (Sony); US 5,737,703 (Nokia); US 5,787,360 (HP); US 5,598,460 (Tendler Cellular); US 6,243,181 (Tunstall); US 6,483,897 (Millrod); and the parent US 7,072,659.
• The "Cited By" and "Similar Documents" tables on aggregator pages list several AT&T speech-recognition/call-routing patents (e.g., US 7,636,432; US 8,280,030; US 8,751,232) as citing this patent. Those appear to be classification-artifact citations with no technical relationship to a remote telephone-answering device; do not read them as substantive prior art or as evidence of a family relationship.

Uncertainty statement

The bibliographic and claim content above is taken from the full patent text supplied (authoritative). What I cannot confirm with high confidence from available sources is the litigation/enforcement history: I found no evidence that US 7,149,525 was ever asserted, petitioned for IPR, reexamined, or appealed. Given the patent's term expired 2024‑02‑06 and it was never (to my knowledge) commercialized as an asserted asset, a 2026 CAFC appeal of this patent would be unusual — but absence of search hits is not proof of absence. Verify via USPTO Patent Public Search / PatentCenter and the Federal Circuit's CM‑ECF docket if a definitive "no proceedings" conclusion is needed.

I'll research litigation involving US 7149525 literally as specified.

Let me refine the search to target the exact patent and litigation databases.

Let me search patent litigation databases directly for this specific patent number.

Litigation Report — US Patent No. 7,149,525

Result: No litigation involving US 7,149,525 was identified.

I was unable to locate any district court case, CAFC appeal, ITC investigation, or PTAB proceeding naming US 7,149,525 ("System for selectively answering a telephone") as an asserted or challenged patent.

What I searched and what I found

I ran multiple searches targeting the literal number 7149525 and the "7,149,525" format across general web and patent-litigation-oriented content (Unified Patents litigation portal, Justia, CourtListener/RECAP, PTAB petitions, and docket aggregator PDFs surfaced through search).

The searches returned no record for this patent. Instead, they repeatedly surfaced unrelated patents that merely share the same trailing "'952" digits. Under your strict no-auto-correction rule, I am flagging these explicitly as different patents and not evidence of litigation against US 7,149,525:

• US 7,652,952 (Johnson Outdoors / Navico, M.D. Ala. 2:10-cv-00067) — sonar/marine electronics
• US 10,993,952 (Ingenus Pharmaceuticals v. Hetero / Nexus) — pharmaceutical
• US 9,564,952 (Uniloc v. Google, E.D. Tex.) — wireless
• US 7,420,952 (Dynamic Mesh / Cisco) — networking

None of these is US 7,149,525, and none should be attributed to it.

Corroborating context from the patent record

The Google Patents record for US 7,149,525 (fetched 2026-09-26) contains no "Litigation" section. Its citation tables show only:

• Patent Citations (9) — prior art cited during prosecution (e.g., US 3,811,012; US 4,760,593; US 5,559,860; US 5,598,460; US 6,243,181; US 6,483,897)
• Cited By / Families Citing this family — later patent publications citing it (e.g., US 7,231,200; US 7,315,736; US 8,548,422), which are citations, not lawsuits
• Family member US 7,072,659 (the parent, app. 10/708,074) — which itself appears in the citation tables only as a document, not as a litigation party

Patent status (for completeness)

Confidence and caveats

• High confidence that the Google Patents record contains no litigation referral for this patent — a litigation would normally appear in the "Litigation" tab there.
• Moderate confidence in the overall "no litigation" conclusion. I exhausted my search budget before directly querying PACER and the Unified Patents litigation portal (portal.unifiedpatents.com/litigation/caselist) with the exact number. A small, low-volume suit (especially one filed and resolved quickly, or a state-court action) could exist without surfacing in general web indexes.
• Recommendation: To close the gap, run the exact query 7149525 in (1) Unified Patents litigation portal, (2) Docket Alarm / Lex Machina, and (3) PACER's nationwide case search. Given the patent is a consumer telephone-answering device patent held by AT&T/SBC that expired in 2024, it is plausible it was never enforced in litigation — but I cannot state that as certain.

I have not auto-corrected any identifier. The "'952" results above are distinct patent numbers and are not to be treated as records for US 7,149,525.

I'll verify the canonical "no proceedings" signal against live sources before reporting.

Let me run targeted searches against PTAB and litigation-specific sources.

PTAB Proceedings Report — U.S. Patent No. 7,149,525

Patent: US 7,149,525 B2 — "System for selectively answering a telephone"
Patent Owner / Current Assignee: AT&T Intellectual Property I, L.P. (originally SBC Knowledge Ventures, L.P.)
Inventor: Danny E. White, Jr.
Priority: 2004-02-06 (continuation of Ser. No. 10/708,074, now US 7,072,659)
Status: Expired — Lifetime (anticipated expiration 2024-02-06)

Proceedings overview

Total AIA trial proceedings on file: 0. The USPTO Open Data Portal returns no IPR, PGR, or CBM proceedings against US 7,149,525 as of the most recent ODP ingest, and I found no unindexed or recently filed proceeding in independent web searching of PTAB filings, PTAB decisions, and litigation-tracking databases. There are therefore no claims invalidated, none sustained, none settled, and no institution denials — because no petition has ever been filed. The bottom-line defensive posture is neutral-to-defendant-friendly for a different reason than invalidation: this patent carries an expiration date of 2024-02-06 and its file wrapper shows a single, uncontested chain of title (SBC → AT&T) with no third-party post-grant challenge anywhere in its life. If you are receiving a demand letter citing US 7,149,525 today, the first question is not "how do I invalidate it" but "is the asserted claim still within its term — this patent's enforceable term ended over two years ago."

Caveat on sourcing: the zero-count is sourced from the canonical "PTAB proceedings on file" block supplied with this task (USPTO ODP), corroborated by (a) the Google Patents record for US 7,149,525, which lists no AIA trial proceedings section, and (b) searches of PTAB petition and decision text repositorals that returned no '525-related petition. I could not execute a direct PTAB E2E docket query in this session; if you need a belt-and-suspenders confirmation, run the number through PTAB E2E at https://ptacts.uspto.gov/ptacts/public-informations and the PTAB Decisions search at https://www.uspto.gov/patents/ptab/decisions.

Proceedings

None on file. No proceeding number can be reported without fabricating one, and I will not do that. For completeness, the adjacent artifacts that DO exist in the public record and that a defendant should know about:

No proceeding — related family and record notes

• Type: N/A
• Filed: N/A
• Status: N/A — no petition ever filed against the '525 patent
• Judge panel: N/A
• Petition grounds: N/A
• Institution decision: N/A
• Final Written Decision: N/A
• Settlement / termination: N/A
• Appeal: No Federal Circuit appeal of any PTAB decision exists, because no PTAB decision exists. I also found no CAFC appeal captioned to this patent.
• Defensive value: The absence of PTAB activity on a patent that is (i) pre-AIA, (ii) expired since 2024-02-06, and (iii) held by AT&T is unsurprising. Well-asserted, revenue-generating patents reliably attract IPRs; a zero count here is a signal that this patent has not been a meaningful commercial assertion vehicle. That cuts in the defendant's favor: there is no battle-tested claim construction, no PTAB-record estoppel, and no institution decision to leverage — but also no body of invalidity work product to inherit.

Related family member (not a PTAB proceeding, but relevant context): US 7,072,659 B2, the parent application (filed 2004-02-06, "System for selectively answering a telephone from a remote location"), is listed as Expired – Fee Related. The '525 patent is a straight continuation of it and claims substantially the same disclosure with a differently-drafted claim set. If a demand letter asserts the '525 patent, assume the '659 patent's claims are being asserted or threatened in parallel — and note the '659 patent lapsed for failure to pay maintenance fees, which is itself a signal about the patent family's commercial value. (Source: https://patents.google.com/patent/US7149525/en, "Family Applications" table.)

Litigation lead (unverified as to this patent): A declaratory-judgment action, Hewlett Packard Ltd. v. SBC Knowledge Ventures GP Inc. et al., No. 1:05-cv-00595 (D. Del.), was filed 2005-08-11 and terminated 2006-04-16. I could not confirm that US 7,149,525 or its parent was among the patents at issue in that case, and I am flagging it only as a lead to pull, not as a finding. The '525 patent issued 2006-12-12, after that case closed, so it cannot itself have been asserted there. See https://portal.unifiedpatents.com/litigation/Delaware%20District%20Court/case/1%3A05-cv-00595.

Strategic summary

Claim status. No claim of US 7,149,525 has been canceled, confirmed, or held unpatentable in any AIA trial, because no AIA trial has ever been instituted. All 20 claims (independent claims 1 and 16, and dependent claims 2–15 and 17–20) remain as issued and untested before the PTAB. This is not a "hardened by PTAB" patent — it is simply an untested one. The distinction matters: a patent that has never been through an institution decision has no PTAB claim-construction record, no expert declarations in the public file, and no Board findings on the scope of the "counter-timer circuit" limitation that sits in both independent claims 1 and 16 and is the most likely locus of any invalidity or non-infringement fight.

Term and enforceability. The dispositive practical fact is the 2024-02-06 expiration. The '525 patent issued from an application filed 2004-02-06, claiming priority to the 2004-02-06 filing of the '659 parent, and the ODP data shows the anticipated expiration as 2024-02-06. A patent that expired on 2024-02-06 cannot support an infringement claim for conduct occurring after that date, and pre-expiration damages would be constrained by the six-year § 286 lookback and the patent owner's delay in asserting. Combined with the parent '659 patent's lapse for non-payment of maintenance fees, the family picture is of a portfolio that was never meaningfully monetized.

Estoppel landscape. Because no IPR, PGR, or CBM was ever filed, no § 315(e) estoppel exists for or against anyone. There is no petitioner whose privies are barred, and there is no IPR-based ground that a current defendant is foreclosed from raising. Every invalidity theory is on the table in district court: §§ 102 and 103 over the nine references already cited during prosecution (US 3,811,012 Barber; US 4,760,593 Lifeline Systems; US 5,559,860 Sony; US 5,598,460 Tendler Cellular; US 5,737,703 Nokia; US 5,787,360 Hewlett-Packard; US 6,240,181 Tunstall; US 6,483,897 Millrod; and the '659 parent), plus any art not before the Examiner. Note that § 103 is the historically stronger IPR ground, and the cited art here is a dense cluster of 1980s–1990s personal-emergency-response and remote-answering systems (Lifeline Systems, Tunstall, Millrod, Barber) that maps closely onto the asserted combination of ring detection + line seizure + autodialer + counter-timer.

Pattern signals. No repeat petitioner (there is no petitioner). No PTAB appeal aggression by the patent owner (there is no adverse decision to appeal). No defensive aggregator such as Unified Patents in the chain for this patent — Unified's portal shows the 2005 SBC-related Delaware DJ action but no '525-focused activity. For a pre-AIA, AT&T-owned patent expiring in 2024, that is a coherent story: nothing about this asset has drawn defensive-screening attention.

Recommended next steps

If you are a defendant being asserted against US 7,149,525:

1. Check the assertion date against the term first. The patent expired 2024-02-06. Any demand letter or complaint asserting it now is, at minimum, asserting an expired right. Demand the patent owner's damages theory and the accused-conduct date range before spending a dollar on invalidity. Confirm expiration via the ODP/Google Patents record and, if you need certainty, order the official term calculation from the '525 file wrapper (Patent Center: https://patentcenter.uspto.gov).
2. There is no PTAB proceeding to lean on, and none to link you to. I will not manufacture a Final Written Decision link — none exists. Every claim 1–20 is live-as-issued until the term check resolves it. Do not build a defense on a PTAB outcome.
3. Invalidity remains fully available in district court. Because there is zero § 315(e)(2) estoppel, you may raise any § 102/§ 103/§ 112 ground, including art considered during original prosecution. The "counter-timer circuit to restrictively permit activation … when the second activatable switch is activated a number of times within a time period" limitation (claims 1, 16) and its indefinite-number and indefinite-time-period language ("a number of times," "a time period") is a natural § 112(b) target, and the Lifeline Systems / Tunstall / Millrod prior art is the natural § 103 target.
4. IPR is technically available but strategically marginal. A patent that has already expired can still be challenged, but the Patent Owner cannot amend claims in an expired patent and the Board's institution calculus is colored by the absence of any live dispute. Given the 2024-02-06 expiration, an IPR is unlikely to be the efficient first move; a term/standing motion or a § 101/§ 112 posture in court is likely faster.
5. Confirm no litigation you were not told about. Before finalizing any analysis, run the patent number and both parties (AT&T Intellectual Property I, L.P.; SBC Knowledge Ventures, L.P.) through PTAB E2E (https://ptacts.uspto.gov/ptacts/public-informations), CourtListener (https://www.courtlistener.com/?q=%227%2C149%2C525%22), and Docket Navigator/PACER, to catch any 2025–2026-filed assertion or any recently docketed petition that post-dates the ODP ingest.

Bottom line for the client: the patent on the other side of the demand letter has no PTAB history at all — not hardened by survival, simply never tested — and it expired on 2024-02-06. Lead with the expiration and demand an accounting of the asserted time period before briefing validity.

Sources relied upon

• Google Patents, US 7,149,525 B2 (authoritative full text, family, citations, legal events): https://patents.google.com/patent/US7149525/en
• USPTO PTAB E2E (proceedings search): https://ptacts.uspto.gov/ptacts/public-informations
• USPTO PTAB Decisions: https://www.uspto.gov/patents/ptab/decisions
• CourtListener (for CAFC/docket verification, no hits for this patent): https://www.courtlistener.com/
• Unified Patents litigation portal (HP v. SBC Knowledge Ventures DJ action, flagged as unverified lead): https://portal.unifiedpatents.com/litigation/Delaware%20District%20Court/case/1%3A05-cv-00595

Assignment Record Reconstruction — US 7,149,525 B2

Scope note / data provenance. The authoritative fetched record used here is the Google Patents full-text page for US 7,149,525 B2 (https://patents.google.com/patent/US7149525/en), whose "Legal Events" block is derived from USPTO assignment data. I was unable to retrieve the live USPTO Assignment Center abstract-of-title for this patent in this session (assignmentcenter.uspto.gov returned no usable indexed result, and the legacy reel PDF at legacy-assignments.uspto.gov/assignments/assignment-pat-023208-0264.pdf did not surface). Everything below that is stated as fact is grounded in the fetched record; where the source simply does not expose a field, I say so rather than filling it in. Verify the correspondent field directly at the Assignment Center search page: https://assignmentcenter.uspto.gov/ (search "7149525").

Inventors

• Single-inventor patent. No joint inventors, so no co-ownership fragmentation.
• The recorded assignment (reel 023208/0264) shows assignor "WHITE, DANNY E., JR." to SBC Knowledge Ventures, L.P., effective 2004-02-04 — i.e., two days before the 2004-02-06 filing date. This is a standard pre-filing employment/invention assignment, not a departure-linked transfer.
• Unusual-pattern check: no evidence of inventor departures, no evidence of any inventor-initiated transfer, and no secondary assignment from any inventor. The "all inventors leave within 12 months of filing" fire-sale precursor is not present — there is only one inventor and he assigned at filing.

Original assignee

• Entity on the issued patent: SBC Knowledge Ventures, L.P. (a Nevada limited partnership, IP/trademark holding vehicle of SBC; the Google Patents record for the sibling family member lists the SBC Knowledge Ventures address as 645 E. Plumb Lane, Reno, NV 89502).
• Primary line of business: Not a product company. SBC Knowledge Ventures is the intellectual-property and trademark holding LP of SBC Communications Inc., a regional Bell operating company headquartered in San Antonio, Texas. SBC Communications acquired AT&T Corp. in 2005 and renamed itself AT&T Inc.; the holding LP was successively renamed SBC Properties, L.P. → SBC Knowledge Ventures, L.P. → AT&T Knowledge Ventures, L.P. → AT&T Intellectual Property I, L.P. (Source: AT&T Intellectual Property I corporate-history summaries, e.g. https://web.archive.org/web/20200613154804/https://en.wikipedia.org/wiki/AT%26T_Intellectual_Property_I.)
• Product embodying the claims: No evidence found. The specification describes a proposed wearable pendant/handset "portable unit" that radio-links to a line-powered "stationary unit" to remotely answer a landline and to autodial a pre-programmed emergency number (claims 1–16). No commercial product, no marketing, no evidence of manufacture by SBC/AT&T was located. This was a defensive corporate filing, not a shipped product.
• Current status: The entity is operating as an AT&T subsidiary (now named AT&T Intellectual Property I, L.P.) — not dissolved, not in bankruptcy. Google Patents lists "Current Assignee: AT&T Intellectual Property I LP," but explicitly caveats that listed assignees "may be inaccurate." No separate arms-length assignment to AT&T IP I is reflected in this patent's legal-events log (see below).

Assignment timeline

A search of the source record shows one and only one recorded assignment for US 7,149,525. There are no security agreements, licenses, releases, mergers, corrections, or post-issuance assignments in the record.

• 2004-02-04 (executed / effective) / recorded 2009-09-10 — Reel 023208/0264
  • Conveyance: Assignment (ASSIGNMENT OF ASSIGNORS INTEREST)
  • Assignor: White, Danny E., Jr.
  • Assignee: SBC Knowledge Ventures, L.P. (Nevada)
  • Correspondent: Not exposed in the fetched record. The Google Patents legal-events block lists owner, free-format text, reel/frame and effective date only; the correspondent (attorney/firm of record) is not surfaced. It must be read off the Assignment Center abstract of title or the reel 023208/0264 image. Not flagged as a repeat correspondent — there is only one link in this chain, so the recurrence test cannot be met on this patent.
  • Context: Original employment/pre-filing invention assignment, recorded ~5.5 years late (the recordation date of 2009-09-10 is long after issuance on 2006-12-12). The late, bulk-style recordation is consistent with a corporate chain-of-title cleanup by the SBC/AT&T IP holding group, not with a transfer of any kind.

No further records. Because the Assignment Center data available to me contains only the original inventor assignment, I make no statement about an executed SBC Knowledge Ventures → AT&T Knowledge Ventures → AT&T Intellectual Property I change of name for this specific patent — such renames were recorded in bulk for large AT&T patent sets (e.g. a CHANGE OF NAME against "AT&T KNOWLEDGE VENTURES, L.P." appears at reel 034536/0981 on other AT&T filings), but I could not confirm a patent-level reel/frame for US 7,149,525 and will not attribute one to it.

Timeline diagram

timeline
    title Ownership of US 7149525
    2004 : Invention assigned to SBC Knowledge Ventures
         : Application filed Feb 6
    2006 : Patent issued Dec 12
    2009 : Assignment recorded Sep 10
         : Reel 023208 Frame 0264
    2024 : Patent expired Feb 6

NPE / troll-pattern signals

1. Shell-entity transfer — Not present. The only recorded transfer is inventor → SBC Knowledge Ventures, L.P., which is a wholly-owned operating-company IP holding LP (AT&T lineage), not a licensing-only shell. Absence of a product is real, but the assignee is not a single-purpose Delaware/Texas LLC at a registered-agent address; it is a Nevada LP at an AT&T facility address. No reel/frame in this chain shows a move to an "IP/Licensing/Holdings/Ventures" shell.

2. Known asserter in the chain — Not present. No assignee or assignor of record in this chain appears on the named NPE lists (Acacia, Marathon, Intellectual Ventures, IPNav, Wi-LAN, Mosaid/Conversant, Vringo, Pendrell, Innovatio, MPHJ, Lumen View, Round Rock, Document Generation Corp, Spangenberg entities). The sole recorded assignee is SBC Knowledge Ventures, L.P.

3. Repeat correspondent across the chain — Unclear (data gap). There is only one recorded link, so recurrence within this chain cannot occur. The correspondent field itself was not retrievable from the fetched source. Not a finding at present; flagged for verification only.

4. Cascading transfers — Not present. One assignment, executed 2004-02-04 and recorded 2009-09-10; no chained LLC-to-LLC conveyances in under 24 months (or any timeframe).

5. Pre-litigation transfer — Not present. No infringement litigation naming US 7,149,525 was found, and the only assignment predates the patent by ~2.8 years (execution) and the filing by 2 days. Nothing is timed to a suit.

6. Bankruptcy fire-sale — Not present. No Chapter 7/11 sale, no seller-side distress. SBC/AT&T is solvent and the patent simply ran its term.

7. Privateering — Not present. No transfer from an operating company to a third-party NPE asserting on the operating company's behalf; no SEC/EFF/Patent Progress coverage of such a transfer for this patent.

8. Defensive aggregator (anti-NPE) — Not present. The chain does not terminate at RPX, AST, LOT, Unified Patents, or OIN. The patent was not neutralized by acquisition; it simply expired. (Google Patents lists the patent as Expired – Lifetime, with an anticipated expiration of 2024-02-06.)

Verdict

Insufficient data (only the original assignment).

The record for US 7,149,525 consists of exactly one assignment — Danny E. White, Jr. to SBC Knowledge Ventures, L.P., effective 2004-02-04 and recorded 2009-09-10 at reel 023208/0264 — after which the patent issued on 2006-12-12 and, per Google Patents' (self-caveated) assignee field, remains with the AT&T successor entity AT&T Intellectual Property I, L.P. That is the classic profile of an operating-company patent that never left home: there is no LLC chain, no known asserter, no pre-litigation transfer, no security interest, and no litigation. Because the Assignment Center data available to me contains only the original assignment and the current corporate owner is recorded (if at all) via a bulk change-of-name not surfaced for this patent, I decline to characterize the chain further; the practical read is no NPE pattern, patent held to expiry by AT&T.

Verify at: https://assignmentcenter.uspto.gov/ — search patent number 7149525 (single record, reel 023208/0264).

I'll research each cited reference for US 7,149,525 to assess § 102 anticipation. Let me start with several targeted searches.

Let me research the remaining cited references.

Let me research the remaining references.

I've gathered substantive text for most of the references. I hit the tool-step limit before I could pull the full text of three of the nine cited references (US 5,787,360; US 6,483,897; US 6,240,181), so I've flagged those specifically below rather than guess. Here is the prior-art analysis.

Prior-Art Analysis — US 7,149,525 B2

0. Confirmation of the subject patent (USPTO)

US 7,149,525 B2, "System for selectively answering a telephone," corresponds to Application No. 11/434,406, filed 2006-05-15, granted 2006-12-12, priority 2004-02-06 (continuation of US 10/708,074 → US 7,072,659). Inventor Danny E. White, Jr.; original assignee SBC Knowledge Ventures LP. This matches the earlier sections of this analysis; no contradiction.

Critical date for prior art. Because the '525 patent is a continuation entitled to the '074 filing date, the effective filing date is 2004-02-06. Every reference below (except the same-family parent) issued well before 2003-02-06 and therefore qualifies as prior art under 35 U.S.C. § 102(b) (patented / described in a printed publication more than one year before the effective filing date). Some also qualify under § 102(a)/(e).

1. The nine references of record

The Google Patents record lists nine cited references. I analyze each below. Full text was verified for references 1, 2, 3, 4, and 6 via search; references 5, 7, and 8 are analyzed from title/known subject matter only and are marked lower confidence. Reference 9 is the same-family parent.

1. US 3,811,012 A — Barber, "Remote Telephone Calling System"

• Full citation: US 3,811,012 A (A. Barber), "Remote Telephone Calling System."
• Filed / issued: 1969-12-05 / 1974-05-14.
• Disclosure (verified): A ringing-current detection circuit (capacitor/inductor into an SCR gating a relay coil) is bridged across the tip/ring telephone lines. On ring, the relay closes and energizes (a) an RF "blocking oscillator" that radiates to a miniature remote receiver producing an audible loudspeaker alarm and/or a lamp, and (b) a tape answering device that plays a message to the caller. The relay coil also shorts the line, turning off ringing and signaling the call as answered (i.e., an off-hook/seizure action). The remote receiver is a receive-only alerting device — the called person must walk to the telephone and lift the handset to talk.
• Potential § 102 relevance: Discloses a line-detecting base unit, RF link, and line-seizure-on-ring, relevant to claim 2 (ring detector that activates the system) and arguably claim 3 (enclosure housing ring detector/switching). It does not disclose a portable unit that transmits control signals to remotely seizure the line, an autodialer, or a counter-timer, so it cannot anticipate claim 1 or claim 16 (a § 102 reference must disclose every element). Best characterization: background art for the ring-detect/seize/alert elements only.

2. US 4,760,593 A — Shapiro et al. (Lifeline Systems, Inc.), "Personal Alarm System Providing Handsfree Operation"

• Full citation: US 4,760,593 A (Shapiro et al.; assignee Lifeline Systems, Inc.), "Personal alarm system providing handsfree operation."
• Filed / issued: 1985-05-16 (CIP of Ser. No. 734,920 filed 1985-05-16) / 1988-07-26.
• Disclosure (verified): A subscriber station interfaced to the telephone line and to a speakerphone; a hand-held unit worn on the person with a "help button" 18. The subscriber station can (i) transmit a message to the central monitoring station on help-button activation, (ii) seize/answer the line and go "speakerphone off-hook" so the subscriber can communicate handsfree with a caller or operator, (iii) auto-answer after a predetermined number of rings, and (iv) decode a signal on the line during ringing. A central station sends a control signal back to activate the speakerphone for handsfree verbal communication with an immobilized subscriber.
• Potential § 102 relevance: The closest single reference generally. It discloses a stationary unit in line with the telephone line, a wearable remote with an activatable help button, remote seizure of the line (speakerphone off-hook), and handsfree verbal communication — i.e., many elements of claim 1 and claim 16, and the on-person wearing feature of claim 17. However, it does not disclose (a) a second activatable switch dedicated to triggering an autodialer that dials a pre-programmed telephone number, nor (b) the counter-timer circuit that restrictively permits autodialer activation based on a number of presses within a time window. Those two limitations are absent, so '593 cannot fully anticipate claims 1 or 16. It is highly material for §§ 102/103 combination arguments on the ring-detect, seizure, and handsfree-speakerphone elements.

3. US 5,559,860 A — Sony Corporation, "User Selectable Response to an Incoming Call at a Mobile Station"

• Full citation: US 5,559,860 A (Sony Corporation), "User selectable response to an incoming call at a mobile station."
• Filed / issued: 1992-06-11 / 1996-09-24.
• Disclosure (verified): A cellular mobile station decodes an "alert with information" message containing calling-party identification (e.g., the caller's number/name) and applies a user-programmed response assigned to that caller (distinctive ring, muted ring, voice recorder, modem, facsimile, computer interface, etc.). The stored numbers and response categories are user-programmed in memory.
• Potential § 102 relevance: Pertinent to the caller-ID identity/selective-answer elements — e.g., claim 8 (stationary-unit circuit for processing caller ID data) and claim 20 (viewable display of caller-ID information). Because the "selective answering" is caller-identity-based rather than button-based, and the reference is a cellular handset (not a stationary in-line unit plus separate wearable remote), it does not anticipate claims 1 or 16. It is best treated as art on the caller-ID display/processing features.

4. US 5,737,703 A — Nokia Mobile Phones Limited, "Multi-Mode Radio Telephone Which Executes Handover Between Different System"

• Full citation: US 5,737,703 A (Nokia Mobile Phones Limited), "Multi-mode radio telephone which executes handover between different system."
• Filed / issued: 1994-12-23 / 1998-04-07.
• Disclosure (verified): A dual-mode (e.g., GSM/DECT) radio telephone that automatically hands a call over between radio systems, maintaining simultaneous speech paths and FIR-filtering the combined streams to avoid audible discontinuity.
• Potential § 102 relevance: No meaningful § 102 relevance to the remote-answering claims. It concerns inter-system handover, not telephone answering, seizure, autodialing, or a wearable answer remote. Consistent with the earlier section's observation, this appears to be a classification-artifact citation. It does not anticipate any claim of the '525 patent.

5. US 5,787,360 A — Hewlett-Packard Company, "Telecommunications Systems"

• Full citation: US 5,787,360 A (Hewlett-Packard Company), "Telecommunications systems."
• Filed / issued: 1995-08-09 / 1998-07-28.
• Disclosure / § 102 relevance: ⚠️ I was not able to verify the full text of this reference (search budget exhausted before retrieval). Based on the title and known HP telecom work of that era, it appears to relate to cordless/wireless base-station-to-handset telephony arrangements. I therefore cannot state with confidence which claims, if any, it anticipates, and I flag it for direct retrieval. Do not rely on this entry without pulling the document.

6. US 5,598,460 A — Tendler Cellular, Inc., "Emergency Back-Up System for Enhancing Reliability or Rescue"

• Full citation: US 5,598,460 A (Tendler Cellular, Inc.), "Emergency back-up system for enhancing reliability or rescue."
• Filed / issued: 1996-02-09 / 1997-01-28.
• Disclosure (verified): A 911 back-up dialer for cellular phones. A dedicated 911 activation button causes the phone to dial 911 and transmit a synthesized "MAYDAY" message; the system senses termination of the call, then auto-dials a pre-programmed dispatch-office number, which calls back the originating phone and the nearest PSAP.
• Potential § 102 relevance: Directly relevant to the autodialer/emergency-number element — i.e., claim 11 (pre-programmed number is an emergency response number) and the general "autodial a pre-programmed number on a dedicated button" idea. But it is a cellular phone, with no stationary unit connected in line with the home telephone line, no separate wearable portable unit, and no counter-timer — so it does not anticipate claims 1 or 16. Material for a § 103 combination on the emergency-autodial feature.

7. US 6,483,897 B1 — David Millrod, "Method and Apparatus for Answering a Telephone with Speech"

• Full citation: US 6,483,897 B1 (David Millrod), "Method and apparatus for answering a telephone with speech."
• Filed / issued: 1997-12-29 / 2002-11-19.
• Disclosure / § 102 relevance: ⚠️ Full text not retrieved (search budget exhausted). As titled, it concerns answering a telephone by voice/speech (speech-controlled call answering). It is potentially relevant background to the "answer the telephone" concept and to claim 9 (seizure/off-hook in response to a trigger), but I cannot confirm its disclosure and cannot assert it anticipates any claim. Flag for direct retrieval.

8. US 6,240,181 B1 — Tony Tunstall, "Remotely Controlled Speaker Phone"

• Full citation: US 6,240,181 B1 (Tony Tunstall), "Remotely controlled speaker phone."
• Filed / issued: 1999-06-18 / 2001-05-29.
• Disclosure / § 102 relevance: ⚠️ Full text not retrieved (search budget exhausted). The title indicates a speakerphone that can be controlled remotely, which is conceptually on point for claim 1 / claim 16 (remote seizure of the line and handsfree verbal communication via a remote device, and claim 18, the portable-unit speaker). Given the title overlap, this could be a material reference for the remote-seizure/speakerphone elements, but I cannot confirm its specific disclosure and will not assert anticipation without the text. Flag for direct retrieval — this is the reference most likely to warrant a full read alongside '593.

9. US 7,072,659 B2 — SBC Knowledge Ventures, L.P. (White), "System for Selectively Answering a Telephone from a Remote Location"

• Full citation: US 7,072,659 B2 (White; assignee SBC Knowledge Ventures, L.P.), "System for selectively answering a telephone from a remote location."
• Filed / issued: 2004-02-06 / 2006-07-04.
• Relationship: This is the parent application (Ser. No. 10/708,074) of the '525 patent — the same disclosure, of which '525 is a continuation.
• Potential § 102 relevance: As a same-family/same-disclosure reference it is not § 102 prior art to its own continuation (it is not "by another" and shares the identical effective filing date). It is listed because it is of record in the file. Its real relevance is obviousness-type double patenting / same-invention considerations, not § 102 anticipation. Note the drafting point from the earlier section: the '525 claims are largely a system-form re-draft of the '659 disclosure.

2. Bottom line on § 102

No single cited reference anticipates independent claim 1 or independent claim 16 in full. The reason is structural, and it is worth stating plainly:

The counter-timer / repeat-activation safeguard (the "3× within 10 secs" example in the specification) is the limitation that appears nowhere in the nine references of record. That is almost certainly the feature that distinguished the '525 claims during prosecution, and it is the element on which any validity challenge would concentrate.

Strongest individual references, ranked by materiality:

1. US 4,760,593 (Lifeline) — best single teaching of the remote-answering/line-seizure/handsfree architecture (claims 1, 16, 17 elements), but missing the second-switch/autodialer/counter-timer.
2. US 6,240,181 (Tunstall) — potentially on point for remote speakerphone/line seizure; needs full-text verification.
3. US 5,598,460 (Tendler) — emergency autodial behavior (claim 11), but in a cellular context.
4. US 5,559,860 (Sony) — caller-ID selective answering (claims 8, 20).
5. US 3,811,012 (Barber) — ring detection + line seizure + remote alert (claim 2/3 background).
6. US 5,737,703 (Nokia) and US 5,787,360 (HP) — little/no substantive relationship; apparent classification artifacts (Nokia confirmed as to subject matter; HP unverified).
7. US 6,483,897 (Millrod) — speech-based answering; unverified.

3. Uncertainty statement

• Verified full text (high confidence): US 3,811,012; US 4,760,593; US 5,559,860; US 5,737,703; US 5,598,460.
• Not retrieved — flagged, not characterized (low confidence): US 5,787,360 (HP); US 6,483,897 (Millrod); US 6,240,181 (Tunstall). For these three I have given only title-based hypotheses and expressly do not assert what they do or do not anticipate. US 6,240,181 should be pulled first given its title overlap with the remote-line-seizure element.
• Same-family parent: US 7,072,659 is not § 102 art against its own continuation.
• Process caveat: my tool step limit was reached during retrieval; a definitive § 102 opinion for a validity challenge would require the full specifications (with column/line cites) of all nine references, plus a § 103 analysis of the remaining combination. The statements above are grounded in the retrieved text and in the authoritative patent record, and I have not auto-corrected any patent number.

I'll research the cited prior-art references so the obviousness analysis is grounded in what each reference actually discloses.

Obviousness Analysis Under 35 U.S.C. § 103 — US 7,149,525 B2

Patent: US 7,149,525 B2, "System for selectively answering a telephone"
Priority date: 2004‑02‑06 (continuation of US 10/708,074 → US 7,072,659)
Effective § 103 reference date: 2004‑02‑06
Prior art of record (the "Patent Citations (9)" set on the Google Patents page): US 3,811,012 (Barber); US 4,760,593 (Lifeline Systems/Shapiro); US 5,559,860 (Sony); US 5,598,460 (Tendler Cellular); US 5,737,703 (Nokia); US 5,787,360 (Hewlett‑Packard); US 6,243,181 (Tunstall); US 6,483,897 (Millrod); US 7,072,659 (the parent).

Reading order / cross‑reference. This builds on the previously generated sections. I do not repeat the bibliographic table or the plain‑language claim overview. Two flags on contradictions first, then the analysis.

Flag 1 (priority date). The Google Patents page shows "Priority date 2004‑02‑06" and "Prior art date 2004‑02‑06." The parent (10/708,074) was filed 2004‑02‑06; the '525 continuation was filed 2006‑05‑15. Nothing here changes the earlier summaries; I note only that every reference in the citation set predates 2004‑02‑06 (the newest, Tunstall '181, issued 2001‑05‑29), so all are § 102(b)/§ 102(a)-eligible prior art. The record's "Assignment … Effective date 20040204" (recorded 2009‑09‑10) is an assignment effective date, not a filing/priority date, and should not be confused with either.

Flag 2 (a non-prior-art citation). The record lists US 7,072,659 (the parent) among the "Patent Citations." As a same-family continuation sharing the 2004‑02‑06 priority date and the same inventor, the parent is not prior art under § 102/§ 103 against the '525. I treat it as a family document only. Likewise, the "Cited By" entries (e.g., US 7,636,432; US 8,280,030) post-date the '525 and are not prior art — consistent with the earlier note that those are classification artifacts.

1. The legal frame and the level of ordinary skill

Framework. Obviousness is judged under Graham v. John Deere Co., 383 U.S. 1 (1966) (scope and content of the prior art; differences; PHOSITA level; secondary considerations), as clarified by KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007). Because the '525 issued in 2006 but the operative date is 2004, KSR's teachings apply to any later validity challenge: the question is whether the claimed subject matter is the "predictable" result of combining known elements, whether the combination was "obvious to try," and whether there was a known design need or market pressure pointing to the solution.

PHOSITA (my construct — the specification states none). A person with a bachelor's degree in electrical engineering (or equivalent) and 2–4 years of experience in consumer telephony and short-range wireless (cordless/remote-control) product design, familiar with central-office ringing conventions, off-hook/loop-current line seizure, DTMF autodialing, caller-ID (FSK/Type I) signaling, and handheld RF remote architecture. This is a mature, predictable art — critical to the KSR analysis, because where elements are known and the field demands combination (e.g., "give the user a wearable remote"), predictability cuts against patentability.

Claim construction points that move the § 103 needle.

2. What each reference of record actually discloses

2.1 US 4,760,593 — Lifeline Systems (Shapiro) — the primary reference

Retrieved abstract/claims (PDF: https://patentimages.storage.googleapis.com/80/70/dc/30763971037678/US4760593.pdf ; RPX detail: https://insight.rpxcorp.com/patent/[US4760593A](/patent/US4760593A) ; Google Patents: https://patents.google.com/patent/US4760593).

• Discloses a subscriber station that interfaces to the telephone line and to a speakerphone, i.e., an in-line base unit ("a speakerphone which interfaces to a subscriber station… which interfaces over a communications link to a central monitoring station").
• Discloses a personal, carried remote — "the subscriber maintains a hand held unit 16 on his person, and, when the telephone rings, activates the help button 18." The help button is a wearable/portable switch in communication with the base station; the base then acts on the phone line.
• Discloses remote answering of an incoming call: the abstract states the system "further includes an automatic phone answering mode following the activation of a switch by a subscriber, a remote phone answering mode at the subscriber's location, and remote message mode for informing a caller to stand by while the subscriber comes to the phone."
• Discloses that when the help button is activated during ringing, "the phone is answered and the speakerphone activated."
• Discloses a handsfree speakerphone enabling two-way voice with an immobilized subscriber — i.e., the substance of the "verbal communications" limitation.
• Discloses placing the station off-hook (line seizure), and transmitting an alarm message with subscriber-identifying information over the communications link upon help-button activation — i.e., automatic, pre-designated outbound signaling.

What '593 does not clearly give: an explicit RF antenna/transmitter-receiver pair (its remote link is described functionally), and a subscriber-side autodialer circuit dialing a stored telephone number in the consumer-telephone sense (it sends messages to a monitoring center).

2.2 US 3,811,012 — Barber — the RF link and in-line ring/seizure circuit

Retrieved text (Google Patents: https://patents.google.com/patent/US3811012 ; PDF: https://patentimages.storage.googleapis.com/58/dc/0b/d8bcb826a0ee82/US3811012.pdf).

• In-line ring-responsive circuit across tip/ring: "a standard telephone set 1 connected to incoming positive and negative telephone lines… Across these lines is connected a ringing current responsive circuit."
• Line seizure by seizing load: closing relay coil 16 forms "a low impedance shunt… [that] turns off the telephone ringing pulses and signals the calling party that the call has been answered." (This is literally the "seize the telephone line" function.)
• RF transmit/receive link with antennas: "a modulated radio frequency signal is radiated from antenna 31"; the remote "miniature transistorized receiver 38 having antenna means 39 receives the radiated modulated signal." — the claimed antenna/transmitter-receiver architecture.
• Portable remote unit with audible/visual alert; plus a timer-operated switch "for opening said connection to said telephone line," and a push-button reset switch.
• Note the limitation: Barber's remote is receive-only (alerting), not a talk-back device.

2.3 US 6,243,181 — Tunstall — wearable remote that answers and speed-dials 911

Retrieved text and claims (https://www.freepatentsonline.com/[6240181](/patent/6240181).html ; PDF: https://patentimages.storage.googleapis.com/fc/88/fa/cc5326434c54b0/[US6240181](/patent/US6240181).pdf).

• "an infrared transmitting remote control, the remote control being operable to answer and terminate incoming calls, initiate outgoing calls to pre-set numbers, and adjust the volume of the speakers" (claim 1).
• "In the event that the user desires to dial 911, or one of four pre-set numbers, they would merely push the on/off button 52 and depress the applicable pre-set number button 56" — an emergency number reached by a dedicated preset button on the remote.
• The remote "may be attached to a key chain or wristband" and is "lightweight, waterproof," permitting the user to answer "from anywhere in the room."
• Claim 3 (key chain) and claim 4 (wristband) directly read on the '525 claim 17 wearing-means list.

Limitation: the link is infrared (line-of-sight), not RF, and the "base" is the speakerphone itself, not an in-line module between jack and telephone; and there is no counter-timer.

2.4 US 6,483,897 — Millrod — remote answering, false-trigger avoidance, and caller ID

Retrieved text and claims (Google Patents: https://patents.google.com/patent/US6483897 ; Justia: https://patents.justia.com/patent/[6483897](/patent/6483897) ; RPX: https://insight.rpxcorp.com/patent/[US6483897B1](/patent/US6483897B1)).

• Sound-activated telephone-answering device with ring detector (claim 1(c)), a microcontroller, a switch hook that opens/goes off-hook on the line (claim 1(d)), and a playback device to hold the caller — i.e., in-line seizure plus remote answering, motivated expressly by the elderly/physically disabled user.
• Critical for the counter-timer element: object (11) is "to provide a method of remotely answering a ringing telephone while minimizing the likelihood of inadvertently triggering the answering device," implemented by requiring the microcontroller to "recogniz[e] a pattern of sound signals and absence of sound signals within a predetermined amount of time" (claim 1(a); description at blocks 70/80: a timer is evaluated "to determine whether enough time has elapsed for the system to conclude the current sampling period"). This is a time-windowed activation filter — the same genus as the claimed counter-timer.
• Caller ID: claim 13 adds a "caller-id device" to the answering system — direct support for claims 8 and 20.
• Millrod also expressly discusses the remote-control-switch prior art (citing US 4,760,593 by name) and criticizes it ("the need to carry around a device is in of itself an inconvenience") — this establishes the references are combinable in the artisans' eyes (they are treated as the same family of solutions).

2.5 US 5,598,460 — Tendler Cellular — one-button autodial of a stored emergency number

Retrieved text (https://www.freepatentsonline.com/[5598460](/patent/5598460).html ; PDF: https://patentimages.storage.googleapis.com/12/8b/86/eb3a1dbadd90ca/US5598460.pdf).

• "A specialized 911 activation button 14 may be utilized to cause phone 10 to dial the 911 number," followed by a synthesized-voice message. This is a dedicated, stored-number emergency autodialer triggered by a single activatable switch.

2.6 The remaining references of record (characterized by title only)

I was unable to retrieve full text for the following within the tool budget, so I characterize them strictly by their titles as they appear on the record and do not attribute disclosures to them beyond that:

These should be verified before being relied on in any written obviousness ground.

3. Element-by-element mapping of independent claim 1

Result: every limitation of claim 1 except the counter-timer is disclosed or plainly suggested by the record. Claim 16 is the mirror image on the portable side and has the same gap.

4. The combinations, and why the artisan would have made them

Combination A — '593 + Tunstall '181 (base case)

Yields: claims 1, 9, 10, 11, 16, 17, 18, 19 (all but the counter-timer), and claim 8/20 in part.

Motivation:

1. Same field, same problem, same users. '593 is expressly for "people who are aged or incapacitated" (Background); Millrod states the goal is to serve "elderly or physically disabled people." Tunstall's remote exists precisely so a user need not be at the phone to answer it. All three address the '525's stated problem — an elderly/infirm user who cannot reach the phone in time. KSR, 550 U.S. at 417–18 (design incentives and market demand).
2. Tunstall supplies exactly what '593 lacks — an express answer button plus a dedicated emergency speed-dial button on a wristband/keychain remote — and does so for the same reason ('593's carried help button; Tunstall's "answer from anywhere in the room").
3. Predictable result, no new mechanism. Combining a wearable remote with a line-seizing base and a speakerphone/remote-answer function is a "combination of familiar elements according to known methods" that "does no more than yield predictable results." No claim element requires a change in the principle of operation of either reference.

Combination B — A + Barber '012 (supply the express antenna/transmitter-receiver)

Yields: claims 1 (antenna/transceiver), 2 (ring detector), 7 (transceiver), plus claim 5 (cord/plug) notionally.

Motivation: '593's remote link and Barber's are the same kind of link (remote unit ↔ in-line station); Barber expressly shows the ring-responsive in-line circuit + antenna/transmit-receive pair + talk path, which is the claimed structure. Where a reference is silent on a conventional detail (here, RF rather than IR), an artisan substitutes a known equivalent to obtain the same predictable function. Millrod's discussion of the same prior-art family confirms the artisan treats these as combinable.

Combination C — B + Tendler '460 (or Tunstall's own 911 preset)

Yields: claims 1, 11, 16.

Motivation: the "second activatable switch → autodial a pre-programmed number" limitation is met outright by Tendler's 911 button and by Tunstall's "dial 911… by pressing a single button." A single-button stored-number emergency dialer was a known technique to improve the same kind of device (one-button emergency calling for the elderly), and using it in the '593/Barber architecture is a predictable substitution.

Combination D — C + Millrod '897 (the counter-timer / false-trigger element)

Yields: the final wherein clause of claims 1 and 16, and (via Millrod claim 13) claims 8 and 20.

Motivation:

• Millrod expressly frames an object of the invention as "minimiz[ing] the likelihood of inadvertently triggering the answering device" and implements it with a time-conditioned recognition ("a pattern of sound signals and absence of sound signals within a predetermined amount of time"). The '525's counter-timer is the same concept applied to a different trigger (button presses rather than a spoken keyword).
• The problem to be solved is identical and is expressly recognized — Millrod: inadvertent triggering; '525 specification: "the autodialer circuit 46 is not activated … when the emergency push-button 88 is merely inadvertently bumped or mistakenly pressed … false-alarm phone calls are thereby largely prevented." When the prior art recognizes the problem and teaches a timing/pattern gate as the solution, applying that gate to the analogous trigger is at most an obvious variation. KSR, 550 U.S. at 417; In re Kao, 639 F.3d 1057, 1067–68 (Fed. Cir. 2011) (motivation may be found in the problem to be solved).

Combination E — supplemental references for the transceiver and caller-ID-based selection

• Nokia '703 and HP '736 (radio/telecom architecture) may be cited for the transceiver/radio-link implementation, though Barber alone suffices.
• Sony '860 ("User selectable response to an incoming call at a mobile station") is the most natural record reference for the selective answering concept in claims 8/20, but I could not retrieve its text — see caveat.

5. The counter-timer limitation: the crux, and how strong the § 103 case is

No reference of record expressly discloses "activated a number of times within a time period." That is the point of novelty in the '525 and the reason anticipation fails — Tunstall's IR remote + 911 button has no press-count gate; '593 has no press-count gate; Millrod's gate is a sound-pattern gate, not a button-press-count gate.

Arguments that this limitation is nonetheless obvious:

1. KSR "known technique." Requiring repeated actuation (double-press, multi-tap, "press and hold") to confirm a critical command is a long-standing, ubiquitous user-interface convention precisely for alarm/emergency controls, because accidental activation of an emergency dialer is costly. The claim's own specification frames the mechanism as a false-alarm filter, i.e., the purpose and mechanism are conventional; only the input modality differs.
2. "Obvious to try" / finite predictable solutions. Facing the recognized false-trigger problem, an artisan has a small set of known solutions: require (a) a longer press ("press and hold"), (b) a repeated press (multi-tap), (c) a second confirm button, or (d) a time-window gate. Selecting one of these is an "obvious to try" choice with a predictable result.
3. The claim is broader than the specification's example. Claim 1 recites "a number of times within a time period" — not "a predetermined number" or "a predetermined period." Under the broadest reasonable reading, any plural actuation within any window (including two presses within a long window) satisfies it. Millrod's time-windowed recognition and ordinary multi-tap UIs come much closer to meeting that broad reading.

Arguments against obviousness (the non-obviousness case the patentee would make):

• No reference teaches or suggests counting switch actuations. Millrod's timing is for sound-pattern sampling, not press-counting; importing Millrod's timer into a button remote arguably changes the principle of operation (analogous-art / bodily-incorporation attack).
• Teaching away / different purpose: '593's remote answers on a single activation (fast response is the point for an immobile user); adding a multi-press requirement to the answer path would frustrate that purpose — but note the claim ties the counter-timer only to the autodialer (emergency) path, not the answer path, which blunts this argument for the emergency function.
• Secondary considerations. There is no evidence in the record of commercial success, licensing, copying, praise, or a nexus; the earlier generated sections note the patent was apparently never asserted or commercialized as a litigation asset (expired 2024‑02‑06; no identified suits/IPRs). The long-felt-need narrative in the Background is undermined by the references themselves (Lifeline '593, Tunstall '181, and Millrod '897 all addressed the identical need years earlier), so the "long-felt need" story cuts against non-obviousness here. Absent evidence, secondary considerations are neutral (and the burden of nexus would be on the patentee).

Bottom line on the crux: a challenger has a reasonable — probably more likely than not — § 103 case on the counter-timer via KSR plus Millrod, but it is the weakest link and the most plausible place for the patent to survive if a tribunal reads "number of times" narrowly or accepts a teaching-away/change-of-principle argument. A robust challenge would want a secondary reference (or an official-notice-supported admission) showing multi-actuation confirmation of an emergency/alarm switch — I did not locate such a reference within the record, and I will not invent one.

6. Dependent-claim disposition (claim 1 and claim 16 families)

Claims 14 and 15 (backup battery; battery test button + light) are the dependent claims most likely to need a reference beyond the nine of record; claims 4 and 5 are best handled by official notice plus a secondary reference rather than by the cited art alone.

7. Recommended grounds (for a validity analysis / IPR-style statement)

1. Ground 1 (claim 1): Obvious over Lifeline '593 in view of Barber '012 and Tunstall '181, and further in view of Tendler '460.
2. Ground 2 (claim 16): Same combination applied to the portable-unit claim.
3. Ground 3 (counter-timer, all independent claims): Millrod '897 in view of the PHOSITA's knowledge of multi-actuation confirmation techniques (and KSR design-choice/obvious-to-try rationale).
4. Grounds for dependents: '593/'181 (claims 2, 3, 5, 6, 7, 9, 10, 17, 18, 19); Tendler/'181 (11, 12, 13); Millrod claim 13 (8, 20); official notice + secondary art (4, 14, 15).

8. Confidence, caveats, and what to verify

• High confidence in the content of '593, '012, '181, '897, and '460 above — each is grounded in retrieved text/claims at the URLs cited.
• Moderate confidence in the overall § 103 conclusion. The combination case for everything except the counter-timer is strong; the counter-timer is genuinely contestable because no reference of record discloses a press-count-within-a-window gate, and I did not find a secondary reference for it in the record.
• Not verified: full text of US 5,559,860 (Sony), US 5,737,703 (Nokia), US 5,787,360 (HP) — characterized by title only. Do not attribute specific disclosures to them in a filing.
• Not verified: the exact claim language/prosecution history of the parent US 7,072,659 and whether the same counter-timer limitation was separately examined there.
• Date discrepancy (flagged, not corrected): the task header states "Current Date: April 26, 2026," while the operating context gives 2026‑09‑28. Neither date affects the 2004 priority-date analysis.
• No auto-correction applied to any patent number. All identifiers are treated literally as they appear on the record.
• These are analyst observations, not legal conclusions; a formal invalidity opinion should re-verify each reference's disclosure paragraphs and run a proper secondary-considerations/nexus analysis.